#include <stdio.h>
extern int compare(int x, int y);
int main(void) {
  int (*p)(int, int);
  p = compare;
  printf("The function pointer p=%p\n", p);
  printf("ret = %d\n", (*p)(3, 4));
  return 0;
}
int compare(int x, int y) { return 0; }
